Saw-swage.



No. 724,236.. PATENTED MAR. s1, 190s E. PJARMSTRONG. SAW SWAGE.

APPLICATION FILED MAR. 16' 1902.

H0 MODEL.

as co. momu'mp" WASHXNGTON. n. c.

ATENT TFF cE.

EDWARD P. ARMSTRONG, OF DEWDROP, PENNSYLVANIA.

SAW-SWAG E.

SPECIFICATION forming part of Letters Patent No. 724,236, dated March31, 1903.

' Application filed March 15, 1902. Serial No. 98,440. (No model.)

To all whom it may concern.-

Be it known thatL'EpWARD PICKERING ARMSTRONG, a subject of the King ofGreat Britain, residing at Dewdrop, in the county of Warren and State ofPennsylvania, have invented a new and useful Saw-swage, of which thefollowing is a specification.

My invention relates to improvements in saw-swages in which a fixedanvil is held against one side of the saw-tooth and a rota-- toryreciprocating eccentric swaging-die acts on the opposite side of thetooth, the movement of said eccentric die causing the space between itand said anvil to close up or open out, the anvil being placed on itsside of the tooth and slipped back until the tooth rests against saiddie while standing at open, both said anvil and die being secured solidwith the saw-tooth by setting up tight, clampingscrews on either side ofsaid tooth thus securing the steel block or body of the whole swage,which carries said anvil, die, and clamping-screws, and by rotating saiddie part of a revolution it brings pressure to bear against'said toothwhile held between die and anvil as the space between them closes up,thus swaging said tooth out wider; and the object of my invention is,first, to provide a die whose shape is the same from one end to theother, having no notches or changes in the shape whatever during itswhole length; second, to provide a strong, simple, and effective meansto secure said die to the operating-handle in such a manner as to allowit (said die) to be moved endwise in the said handle easily and quicklyto present a new wearing-surface to the tooth being swaged and enablingthe die to be used a great part of its whole length as each spot incontact with the tooth becomes Worn by moving it to a new spot, thusincreasing the life of the die many times over those in useheretoforethird, to provide a die that can be refaced when worn at all the pointswithin the limit of its end movement by taking it out of said handle andgrinding it into shape again on the side of a common emery-wheel, thusforming a new die the whole length again and increasing its life stillmany more times over those in use heretofore; fourth, to provide a diewhich can be easily made from selfhardening steel, which does not permitof machinework being done on it except by emery-wheel, or making saiddie from common tool-steel by milling into shape at one cut a long roundbar and then cutting said bar into short lengths of diesand tempering;fifth, to pro- Vide a swage in which the anvil can be set to projectinto the working hole of the die and saiddie can still he slipped out orin to be cleaned or oiled without changing the adjustment of the anvilor removing it. I attain these objects by the mechanism illustrated inthe accompanying drawings, in which similar letters refer to similarparts throughout the several views.

Figure l is a vertical section of the swage placed on the saw A. Fig. 2is a section of the swage on line 1 2, Fig. 1, looking from the right,and dotted line 3 4 is where Fig. 1 is shown looking from the left. Fig.3 is the dieholder and die. Fig. 4 is a section of Fig. 3 on line 5 6looking from the left and shows die 13 clamped beneath the wedge O bythe screwpressure of handle D, threaded into holder E. Fig. 5 is die B,clamped in holder E by set-screw F and handle D loose on die B andsecured to holder E by set-screw H. Fig. 6 is the same looking-from theleft of Fig. 5, and Fig. 5 is Fig. 6 as seen from the right. Fig. 7 isdie B and anvil J, showing their position ready to swage tooth K byrotating die B part of a revolution to the left, the whole swagecarrying die Band anvil J and holding them in position by being securedto saw A by clam ping-screws M and N, being forced together on eitherside of the saw by turning in screws N by clamping handle 0. r

The swage block or body P constitutes the frame or main body of theswage, the several parts being secured to it. Anvil J is ad j usted upor down and held in place by screws R and S. (See Fig. 2.)Clamping-screws M and N are threaded into the block- P. The guide T issecured to block P by screws V, and guide X is secured to block P byscrews Y. Regulating-stops Z Z are secured to block P in the same manneras guide X and are adapted to be set at any point desired to regulatethe throw of handle D to swage light. or heavy. The die 13 may beoperated and held in holder E either by handle D being fitted as aset-screw on its lower end and it either be screwed right down onto dieB, holding the flattened side of die B at right angles to handle D bymaking the threaded part of handle D longer (see Fig. 4) or setting itonto the wedge 0, made with tapering end so as to carry flat side of dieB out of right angles with the handle D, right angles being right foruse on gang-saws and the wedge position being right for band-saws, or it(die B) may be held in holder E by the setscrew F, (see Figs. 5 and 6,)and handle D being made with a slotted wing D, as shown in Fig. 5, saidwing D being clamped to holder E by screw H, affording a means ofsetting handle D at a great distance from a right angle to flat side ofdie B to adapt it to use on circular saws. The anvil J must be set toproject belowthe top of or into the working hole of the die to someextent to get the adjustment necessary to make the swagin g-cam actproperly on the saw-teeth, the amount varying according to the shape ofthe swage-die and the condition of the saw-tooth to be swaged; but atall times it is sufficient to prevent the sWage-die, as made heretoforein the shape of a cam formed in the center of a round shaft, leaving ashoulder at each end of said cam, said shoulder preventing the cam ordie from sliding out from under it (the anvil J) on account of theshoulders at each end of the swage-die. To provide a swage-die withoutthese shoulders is one of the objects of my new form of die B.

Fig. 3 is a detached view of die-holder and die. The die B is placed inthe horizontal opening of holder E, (see Figs. 3 and 4,) and wedge O isthen dropped in from the top of the vertical opening in holder E andslides down until it rests on the die B. Then the threaded orset-screw-formed handle D is screwed down into the vertical threadedopening in holder E until it strikes the top of the wedge C, and acommon wrench is placed on the hexagon part of the handle D, and it isforced down onto the wedge G, and thus holds handle D, holder E, and dieB all firmly together, and when it is desired to move the die B endwisea little to present a new portion thereof to the saw-tooth itisaccomplish ed by simply slacking the handle D, and thus releasing thedie B and then sliding it endwise to the place desired and again tiltingthe handle D.

In operating the swage the operator stands on the left-hand side of theswage as you look at it in Fig. 2, and the die-handle D is operated withthe left hand, the working stroke being given by pushing it from him andthe angle of the arm causes an end thrust from left to right on the dieB, which is overcome by the hub of the die-holder E forming a collar ondie B and engaging with the side of block P. The return stroke of thedie-handle D having no work to do there is no perceptible tendency onthat stroke to pull the die B out of its place from right to left. Theresult is that said die B stays in its place as determined by the collarformed by die-holder E. The

collar thus formed is one of the essential features of the die-holder E.

The operation is as follows: When the device is in the position shown inFig. 1, the saw-blade A extends into the recess in the lower side ofblock P, and the point of the tooth to be swaged is placed in positionbetween anvil J and die B, and the block P is held in positionrelatively with the rake of the back or top of the saw-teeth by guide '1resting on the teeth in advance of the swageblock P. The whole swage isthen clamped securely to the saw by clampscrews M and N. The swage-die Bis now in such a position that its eccentric side comes in contact withthe under side of the saw-tooth, while the anvil J is held against thetop of the saw-tooth. The operator now takes hold of the handle D andgives it about one-eighth turn to the left. By the operator moving thehandle D thus the die B is turned so that the eccentric side of the dieB acts on the point of the sawtooth and swages the same, the back of thetooth being pressed against the lower end of anvil J. As soon as thishas been accomplished the operator returns the handle D to its formerresting-place against the right-hand regulating-stop Z, then turns thehandle 0 (see Fig. 2) so as to slacken the clampingscrew N, and thusliberate the swage from the saw, and the swage is shoved ahead or to theleft the distance between two teeth, so that the next tooth ahead willpass into the space between the die B and anvil J, as before. The swageis then clamped by screw N and handle 0, and the above-describedoperation is again repeated.

I am aware that prior to my invention sawswaging devices have been madewith rotatory reciprocating dies in conjunction with an anvil. I do not,therefore, claim such a combination broadly; but

What I do claim as my invention, and desire to secure by Letters Patent,is-- In a device for swaging saw-teeth, the combination with the blockor body, and the anvil and clamping-screws, of the swaging bar or die ofuniform cross-section throughout its entire length, and a handle orholder secured thereto, comprising a block having openings therein at anangle to each other; one of said openings designed to receive theswaging bar or die, and a wedge piece and screw or handle in the otheropening whereby the swaging bar or die may be adjusted longitudinallythroughout its length to present different parts thereof to thesaw-tooth substantially as shown and described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

EDWARD P. ARMSTRONG.

Witnesses:

O. M. STEDWELL, O. S. ENGLISH.

